A lot depends on whether you're playing an unmodded game, or using the Conceptual Balance mods, or some other mods.
A search on the boards will locate the bloodhunting formula, but I'd personally be using Diabolists equipped with Sanguine Dousing Rods to do my hunting. Before I have the research to make rods, I might use a Goetic Master to get the blood flowing.
Depends. There's a lot of luck in fortune
If you're playing an unmodded game, taking growth isn't worth the points, and you should probably consider taking death. If you're using the CB mod, growth is more viable, and would result in a higher guaranteed income, but I personally prefer taking Fortune 3 if I'm forced to take turmoil. I just think its fun.
I can't quite figure out what your pretender is intended to do. Having 4 fire is sensible, since you have a starting fire gem income of 4, but I don't know why you'd put death on a Moloch.
The only reason to play Diabolical Faith is to make use of blood. Many of the fun uses require something more than what the Goetic Masters can provide. If all you intend to do with blood is summon Devils, that's fine, but otherwise you might consider a blood pretender.